diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 703e6bdaf0e1fe1ee1b4dd0dba860da1d53155b9..d075f0f7a3de84666c1d69476a84af9a1d47e7a5 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -456,10 +456,12 @@ static int mv88e6xxx_g1_irq_setup(struct mv88e6xxx_chip *chip)
 	 */
 	irq_set_lockdep_class(chip->irq, &lock_key, &request_key);
 
+	mutex_unlock(&chip->reg_lock);
 	err = request_threaded_irq(chip->irq, NULL,
 				   mv88e6xxx_g1_irq_thread_fn,
 				   IRQF_ONESHOT,
 				   dev_name(chip->dev), chip);
+	mutex_lock(&chip->reg_lock);
 	if (err)
 		mv88e6xxx_g1_irq_free_common(chip);